Function spawn_prompt_charter 

fn spawn_prompt_charter(
    charter: &str,
    families: Option<&[String]>,
    systemone_available: bool,
    voice_available: bool,
    vault_available: bool,
) -> String

The charter a spawned worker’s prompt carries: the stored text plus the withheld-family lines for the EFFECTIVE set - the same config gate the tool build applies, so the prompt and the tools cannot disagree about a family.